Theres a good reason for 50Hz in Europe. Its to do with lighting, the studio use 50Hz power which if then played back at 60Hz strobes... So live recordings should always match the power rating of the studio it was recorded in... unless you use expensive rigs that nobody wants to pay for or something like that...Reading the Wiki (which is dangerous I know ) it seems all of Europe are using 50 for broadcasts. But as you say, devs shouldn't really have to bother with it as it is more work for absolutely no gain.
For games being CG it doesn't matter so Sony don't support HD 50Hz, all HD games run at 60Hz.
So our HDTV over here support both...